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OBJECTIVE The incidence of thyroid cancer and metabolic syndrome has been increasing at the same rate over the past few decades. We hypothesized that there would be a direct relationship between thyroid papillary cancer and triglyceride/glucose index (TyG). PATIENTS AND METHODS A total of 382 operated patients were divided into two groups: patients operated on for papillary thyroid cancer and for non-malignant reasons. Each patient's age, gender, operation times, presence of neck dissection, serum thyroid-stimulating hormone (TSH), free triiodothyronine (FT3) and free thyroxine (FT4), fasting blood glucose and triglyceride levels were scanned retrospectively from the archive system. RESULTS TyG index was statistically higher in the malignant group. Receiver operating characteristic (ROC) curves obtained for TyG levels at the time of diagnosis of thyroid papillary cancer were AUC: 0.608. The threshold value for TyG was 6,252. The sensitivity of this value was 62.8% and the specificity was 49.2%. CONCLUSIONS In this study, we investigated the predictive effect of the TyG index in differentiating thyroid papillary carcinoma from non-malignant thyroid lesions. We concluded that the TgY index can be used to identify people at high risk of thyroid papillary cancer and to plan treatment.